DP8497

更新时间： 2024-10-02 09:54:43

品牌	Logo	应用领域
美国国家半导体 - NSC		控制器
页数	文件大小	规格书
92页	955K
描述
SCSI-2 Disk Data Controller

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中文翻译

获取价格

数据手册

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DP8497 数据手册

PRELIMINARY

December 1991

DP8496/DP8497

SCSI-2 Disk Data Controller

General Description

The DP8496/7 is a highly integrated, high-performance

Features

High disk data rates:

Ð DP8496/7-33 33 Mbit/sec

Ð DP8496/7-50 50 Mbit/sec

CMOS SCSI disk data controller. It is designed for use in-

side intelligent hard disk drives that utilize the Small Com-

puter System Interface (SCSI) standard. It can also be used

in ESDI, SMD and ST506 bridging controller applications.

The DP8496/7 includes most of the data path functions

needed to implement a complete hard disk controller. It in-

cludes a full featured SCSI Bus Controller, Buffer Memory

Interface with pipelined pointers, fast Disk Data Controller,

and a Processor Interface.

Synchronous SCSI-2 transfer rates up to 10 MByte/sec

with offset up to 16 (Fast option)

Asynchronous SCSI transfer rates up to 5 MByte/sec

Support for Fast Page Mode and Static Column De-

code type DRAMs

Attains sustained buffer bandwidths above 9 MByte/sec

with byte-wide memory configuration

With the addition of National Semiconductor read-channel

chips such as a PLL Synchronizer, and Encoder/Decoder, a

pulse detector, and a head amplifier, complete data-path

electronics of a SCSI drive can be implemented. A micro-

controller, such as National’s HPC^TM, may be used to man-

age the SCSI commands and the drive specific control sig-

nals. The high level of intelligence implemented on the

DP8496/7 means lower overhead for the disk-drive’s em-

bedded microcontroller, making possible a high-perform-

ance design employing only one micro-controller.

Word-wide buffer memory port allows sustained band-

widths of 17 MByte/sec

Buffer memory up to

SRAM

4 MBytes DRAM or 1 MByte

On-chip DMA with buffered pointer addresses

Multi-phase type SCSI commands

Parity error checking on SCSI, buffer memory, and all

internal data paths

Programmable format and sectoring modes including

soft, pseudo-hard, and hard

The DP8496 provides on-chip single-ended transceivers for

driving the SCSI bus. The DP8497 provides all control sig-

nals necessary for direct interfacing with differential trans-

ceivers recommended for Fast SCSI option of SCSI-2.

32, 48 or 56-bit computer generated ECC with on-chip

correction

On-chip single-ended transceivers on DP8496. DP8497

interfaces directly with differential transceivers for Fast

SCSI

Available in 100-pin PQFP package

System Diagram

TL/F/11212–1

TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.

HPC^TMis a trademark of National Semiconductor Corporation.

1995 National Semiconductor Corporation

TL/F/11212

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6 7...92

中文翻译

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与DP8497相关器件

型号	品牌	获取价格	描述	数据表
DP8497VF	NSC	获取价格	暂无描述
DP84T22	NSC	获取价格	microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers
DP84T22-25	NSC	获取价格	microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers
DP84T22V-25	TI	获取价格	IC,MEMORY CONTROLLER,CMOS,LDCC,84PIN
DP8500	NSC	获取价格	DP8520A/DP8521A/DP8522A microCMOS Programmable 256k/1M/4M Video RAM Controller/Drivers
DP8500V	TI	获取价格	IC,GRAPHICS PROCESSOR,CMOS,LDCC,68PIN,PLASTIC
DP8510	NSC	获取价格	BITBLT PROCESSING UNIT
DP8510V	NSC	获取价格	IC SPECIALTY MICROPROCESSOR CIRCUIT, PQCC44, PLASTIC, CC-44, Microprocessor IC:Other
DP8511	NSC	获取价格	BITBLT PROCESSING UNIT(BPU)
DP8511V	NSC	获取价格	BITBLT PROCESSING UNIT(BPU)

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